Tendon! it just connects the bone to the muscle
Origin
The origin is the "immovable" point of attachment of a muscle to a bone.
Insertion
Where a muscle attaches to a bone is at the origin and insertion points. The origin is the immovable (or slightly moveable) attachment point and the the insertion is the movable attachment point. During contraction the insertion moves towards the origin. HOW a muscle attaches to a bone is through tendons.
constant contraction of a muscle is called the muscle tone
The attachment of the muscle that is on the moving bone is known as the insertion. In contrast, the origin is the attachment of the muscle on the non-moving bone.
Isotonic contraction
a concentric contraction- a concentric contraction involves the muscle length, shortening during a contraction! YA-trick-YA!
During muscle contraction the actin heads pull the sarcomere closed
It is called concentric isotonic contraction.
An involuntary muscle contraction is called a spasm.
Troponin
Myosin acts with Actin during muscle contraction